Q. CRUD Operations.
CRUD Meaning: CRUD is an acronym that comes from the world of computer programming and refers to the four functions that are considered necessary to implement a persistent storage application: create, read, update and delete.
Q. JWT .
WT, or JSON Web Token, is an open standard used to share security information between two parties — a client and a server. Each JWT contains encoded JSON objects, including a set of claims. JWTs are signed using a cryptographic algorithm to ensure that the claims cannot be altered after the token is issued.
Q .What is a mongoose used for?
Mongoose is an Object Data Modeling (ODM) library for MongoDB and Node. js. It manages relationships between data, provides schema validation, and is used to translate between objects in code and the representation of those objects in MongoDB.
Q. Is MySQL is a relational database?
MySQL databases are relational.
The logical model, with objects such as databases, tables, views, rows, and columns, offers a flexible programming environment. ... SQL is the most common standardized language used to access databases.
Q.What is aggregation and example?
Aggregation is the process of combining things. That is, putting those things together so that we can refer to them collectively. As an example, think about the phone numbers on your cell phone. You can refer to them individually - your mother's number, your best friend's number, etc.
Q. Express
Express. js is a free and open-source web application framework for Node. js. It is used for designing and building web applications quickly and easily.
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